A nurse is caring for a client who has Cushing's syndrome. Which of the following interventions should the nurse expect to perform? (Select all that apply.)

A. Insert the IV catheter: Establishing IV access is necessary for medication administration, but it should follow the ECG to confirm the diagnosis and direct further treatment.

B. Initiate oxygen therapy: While oxygen can be important to increase myocardial oxygenation, it is typically administered after confirming the MI. Current guidelines recommend oxygen therapy primarily for patients with oxygen saturation below 90%.

C. Attach the leads for a 12-lead ECG: The 12-lead ECG is the most critical initial step as it is the definitive diagnostic tool for identifying and confirming a myocardial infarction (MI). It helps to determine the type and extent of the MI, which guides subsequent treatment decisions. Quick identification of an MI is crucial for timely intervention.

D. Obtain a blood sample: Blood tests, including cardiac enzyme measurements, are important but secondary to the ECG in the acute phase for diagnosing an MI.

A. Assess for neck vein distention: Neck vein distention can occur in Cushing's syndrome due to fluid retention and hypertension. It is an important sign to monitor as it can indicate complications like heart failure.

B. Monitor for postural hypotension: Clients with Cushing's syndrome typically have hypertension rather than hypotension. Therefore, postural hypotension is not a common issue to monitor for in these patients.

C. Assess blood glucose level: Hyperglycemia is common in Cushing's syndrome due to increased cortisol levels, which promote glucose production and reduce glucose uptake by cells. Monitoring blood glucose is essential to manage this condition.

D. Monitor for an irregular heart rate: Cushing's syndrome can cause electrolyte imbalances (like hypokalemia), which may lead to cardiac arrhythmias, so monitoring for an irregular heart rate is important.

E. Weigh the client daily: Daily weight monitoring helps track fluid retention, which is common in Cushing's syndrome due to cortisol-induced fluid retention. This can help in managing the client’s fluid status and detecting worsening of symptoms.